摘要
<正> Let M((?)~3) denote the group consisting of all orientation-preserving M(?)bius transformations in (?)~3. g∈ M((?)~3) is called elliptic if it has infinitely many fixed points in (?)~3. R. C. Lyndon and J. L. Ullman have ever proved a theorem of the elliptic M(?)bius groups in 2 dimensions. In this letter, we consider the elliptic M(?)bius
